Pokémon Heart & Soul: Beat Leader Misty — Cerulean City Gym, badge 10

What opens up at this point in the game, and everything you can catch by now that you couldn't before.

Now usable

• Super Rod — the Super Rod (found at Route 12)

Newly reachable

Newly catchable (21)

AronCarvanhaDiglettDragonairDugtrioElectrikeGranbullHypnoLanturnLuvdiscMarowakMawileMinunPlusleSableyeSeedotSlakothSpindaSpoinkSurskitSwablu

TMs you can now pick up

• TM34 Shock Wave — Vermilion City Gym
• TM56 Fling — Rock Tunnel
• TM62 Silver Wind — Route 6
• TM64 Explosion — Route 5
• TM69 Rock Polish — Route 10
• TM86 Grass Knot — Route 11
• TM91 Flash Cannon — Route 9

Bosses around here